<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-30 -089 01:50:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Moderate F-spread, F2o cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.03.30 (089) 01:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202608903300150009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="7.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.800" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.260" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="345.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="345.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="455.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="390.601" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="350.128" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.538" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="59.672" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="10.625" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="31.402" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="65.890" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.400" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="116">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
345.000 345.000 350.000 351.200 352.400 353.600 354.800 356.000 357.200 358.400 359.600 360.800 362.000 363.200 364.400 365.600 366.800 368.000 369.200 370.400 371.600 372.800 374.000 375.200 376.400 377.600 378.800 380.000 377.500 375.000 372.500 370.000 372.500 375.000 375.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 385.000 380.000 380.000 380.000 380.000 380.000 377.500 375.000 365.000 365.000 365.000 370.000 367.500 365.000 365.000 365.000 365.000 360.000 360.000 360.000 355.000 355.000 356.250 357.500 358.750 360.000 361.667 363.333 365.000 365.000 365.000 367.500 370.000 371.667 373.333 375.000 376.667 378.333 380.000 382.500 385.000 390.000 395.000 398.333 401.667 405.000 405.000 405.000 405.000 405.000 410.000 412.500 415.000 417.500 420.000 425.000 428.333 431.667 435.000 438.333 441.667 445.000 448.333 451.667 455.000 458.333 461.667 465.000 460.000 457.500 455.000 467.327 481.314 497.318
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 60 57 0 0 0 60 0 0 0 0 0 66 0 0 60 0 0 54 57 0 0 0 0 0 54 60 57 0 0 0 63 54 63 0 0 60 57 57 60 0 60 57 60 0 0 60 57 0 66 69 0 66 60 57 66 0 0 66 63 63 63 54 51 0 0 0 60 0 0 63 63 63 60 63 63 0 63 63 0 63 60 57 0 66 0 0 57 60 57 0 63 57 57 57 60 57 60 54 54 60 54 0 0 51 0 0 0 0 54 51 48 63 0 51 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 -0.390625 2.734375 0.390625 0.390625 0.390625 1.171875 1.171875 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 -0.390625 0.390625 1.171875 -0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 -0.390625 1.171875 1.171875 0.390625 1.171875 1.171875 -0.390625 0.390625 1.171875 1.953125 1.171875 1.171875 -2.734375 1.171875 1.171875 -1.953125 2.734375 -0.390625 1.171875 1.171875 1.171875 0.390625 0.390625 0.390625 0.390625 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="149">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 147.436 150.0 155.0 160.0 165.0 170.0 175.0 180.0 184.872 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 222.308 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 390.601 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.334 0.318 0.295 0.266 0.225 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.201 0.221 0.242 0.262 0.283 0.303 0.324 0.345 0.354 0.386 0.464 0.562 0.671 0.784 0.899 1.017 1.137 1.262 1.392 1.529 1.672 1.825 1.987 2.161 2.349 2.553 2.775 3.018 3.286 3.583 3.914 4.282 4.69 5.136 5.609 6.089 6.55 6.963 7.311 7.585 7.782 7.903 7.949 7.95 7.935 7.885 7.803 7.693 7.559 7.405 7.233 7.049 6.853 6.649 6.44 6.226 6.011 5.795 5.579 5.366 5.155 4.949 4.746 4.549 4.356 4.17 3.989 3.813 3.644 3.481 3.324 3.173 3.028 2.889 2.755 2.627 2.505 2.387 2.275 2.168 2.065 1.968 1.874 1.785 1.7 1.619 1.541 1.467 1.397 1.33 1.266 1.205 1.147 1.092 1.039 0.989 0.941 0.896 0.852 0.811 0.772 0.735 0.699 0.665 0.633 0.602 0.573 0.545 0.519 0.494 0.47 0.447 0.425 0.405 0.385 0.366 0.349 0.332 0.316 0.3 0.286 0.272 0.259 0.246 0.234 0.223 0.212 0.202

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="7.95" PeakHeight="390.601" Num="5" zHalfNm="350.128" Error="6.214">
-148.834 -26.331 3.743 6.713 -3.584
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="112.308" Depth="0.154"/>
<TopsideChapman PeakHeight="390.601" PeakDensity="784150.1" PeakScaleHeight="31.402" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
